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Thread: Air blowing out of the return lines at startup

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    Join Date
    Jul 2009
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    Northern California
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    Air blowing out of the return lines at startup

    My gunnite\plaster pool has been installed for 3 years. This year I added a solar setup to extend the season. Every time the pump fires, I get air out of the returns for a good 60sec, while the filter is pressurizing.

    When the pump is off, there are no bubbles in the pump housing (strainer basket). The solar is off right now, so air I would expect from drain down shouldn't be the culprit.

    I have a 3 way valve from the filter that goes back to the pool and out to the solar, and a check valve on the return. The Check valve and 3Way valve share a T to the return back to the pool.

    I don't remember this happening before I added the plumbing for the solar, is this normal, or do I have a leak somewhere?

    Thanks for all of the info on this site. Waaay better than my local pool store!
    15,000Gal IG Gunite\Color Quartz Plaster
    Jandy CL460 Cart Filter (460sqft, 150GPM)
    Hayward EcoStar SP3400VSP
    AquaPure 1400 SWG

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    X-PertPool's Avatar
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    Jun 2009
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    Exeter, PA
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    Re: Air blowing out of the return lines at startup

    I get air though my returns when I turn my system on as well, I believe it is your solar system. Assuming your solar system isn't homemade there is a air relief valve that lets air in when the system is off. I wouldn't worry about it unless you never stop shooting air out the returns no matter how long it runs.
    -Kevin
    X-Pert Pool Service
    x-pertpool.com
    X-Pert Pool on Facebook and @XPertPoolServic on Twitter
    22,000 gal / 16' x 32' / Vinyl / Hayward s244t /Pentair SuperFlo 1 hp

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    Location
    Northern California
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    Re: Air blowing out of the return lines at startup

    Thanks...
    15,000Gal IG Gunite\Color Quartz Plaster
    Jandy CL460 Cart Filter (460sqft, 150GPM)
    Hayward EcoStar SP3400VSP
    AquaPure 1400 SWG

  4. Back To Top    #4

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    duraleigh's Avatar
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    Apr 2007
    Location
    Sebring, Florida
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    30,084

    Re: Air blowing out of the return lines at startup

    Yes, you have a leak. As you and Kevin suspect, it's likely on the pressure side above the filter so you don't see the air collecting in the pump strainer basket but it is likely collecting in the top of the filter.

    Again, if it stops in 60 seconds, it is hardly worth chasing.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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